Before you go crazy try this. First spray around the bolts with a penetrating oil let it sit for a hour or so. Next using a breaker bar and 6 point socket apply some pressure on the bar to take out any play. While doing so hit the end of the bar with a large RUBBER mallet. You will be amazed at the torque that is generated. The shock of the hammer directly to the bolt is ussually enough to free most any bolt or fitting. Good Luck
Glenn